Fwd: vga16fb diagnostics

[Till Varoquaux]

Forgot reply all again..... Sorry

---------- Forwarded message ----------
From: Till Varoquaux <till.varoquaux at gmail.com>
Date: Oct 1, 2005 11:42 AM
Subject: Re: vga16fb diagnostics
To: Carey O'Shea <carey at internode.on.net>


On my laptop (asus w1n: radeon 9700m) the screen flickers... This has
been detailed a couple of weeks before (but had no answers). I don't
think kernel number has much of an importance since this has been
happening ever since Hoary.



On 10/1/05, Carey O'Shea <carey at internode.on.net> wrote:
> Matthew Garrett wrote:
>
> >Hello,
> >
> >I'm trying to track down why vga16fb doesn't work on some machines. In
> >an attempt to check one thing that may be causing problems, I've written
> >a small program that dumps state about some vga registers. I'm
> >interested in knowing how the values differ between vga16fb and vesafb.
> >If you're having problems with vga16fb, get it from
> >
> >http://www.codon.org.uk/~mjg59/tmp/crtc
> >
> >and do the following:
> >
> >1) Boot into rescue mode. Ensure that no framebuffer is loaded. modprobe
> >vga16fb and then do crtc >vgaregs (you may have to do this blind)
> >
> >2) Boot into rescue mode with the kernel parameter vga=769 and do crtc
> >
> >
> >>vesaregs
> >>
> >>
> >
> >3) Mail the two of them to me
> >
> >Please don't do this if vga16fb works for you.
> >
> >
> Hi Matthew et al,
>
> I did the tests, maybe someone on ubuntu-devel will be able to find out
> what is causing my problems.
>
> carey at sanctuary:~$ cat vgaregs
> 0 is 5f
> 1 is 4f
> 2 is 4f
> 3 is 82
> 4 is 52
> 5 is 9e
> 6 is b
> 7 is 3e
> 8 is 0
> 9 is 40
> a is 20
> b is 0
> c is 0
> d is 0
> e is 0
> f is 0
> 10 is e9
> 11 is b
> 12 is df
> 13 is 28
> 14 is 1f
> 15 is df
> 16 is b
> 17 is e3
> 18 is ff
> carey at sanctuary:~$ cat vesaregs
> 0 is 6d
> 1 is 4f
> 2 is 4f
> 3 is 11
> 4 is 59
> 5 is 87
> 6 is ea
> 7 is 1f
> 8 is 0
> 9 is 40
> a is 0
> b is 0
> c is 0
> d is 0
> e is 6
> f is 66
> 10 is e3
> 11 is 86
> 12 is df
> 13 is 50
> 14 is 40
> 15 is df
> 16 is eb
> 17 is a3
> 18 is ff
> carey at sanctuary:~$
>
>
> --
> ubuntu-devel mailing list
> ubuntu-devel at lists.ubuntu.com
> http://lists.ubuntu.com/mailman/listinfo/ubuntu-devel
>
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